Multiple-unit-controlling system for electric locomotives or motor-cars.



No. 870,147. PATENTED NOV. 5, 1907. R. WIKANDER. MULTIPLE UNIT CONTROLLING SYSTEM FOR ELECTRIC LOCOMOTIVES OR MOTOR CARS.

APPLIOATIOI nun 1.41.5 1901..

3 SHEETS-SHEET 1.

MEMW.

No. 870,147. PATENTED NOV. 5, 1907. R. WIKANDER.

MULTIPLE UNIT CONTROLLING SYSTEM FOR ELEOTRIO LOCOMOTIVES OR MOTOR- CARS.

APPLIOATION FILED JAN.5, 1907.

3 SHEBTS-SHEHT 2.

v No. 870,147. v PATENTED NOV. 5, 1907.

R. WIKANDER. MULTIPLE UNIT CONTROLLING SYSTEM FOR ELEGTRIGYLOOOMOTIVES 7 0R MOTOR CARS. APPLIOATIOH'IILED 1.11.5, 1907.

I a sums-sum a.

T T T 10. 69 66 67 66 65 vided, the said wires being led through all the locomo-.

RAGNAR WIKANDER, OF wssrsnlts, SWEDEN.

IULTIPLE-UNIT-CONTBOLLING BYSTEI FOB ELECTRIC LOCOIOTIVEB OB IOTOB-CABS.

Specification of Letters Patent.

Patented Nov. 5, 1907.

Application filed II-1111111 5. 1901. Seriallo. 351,066.

or Motor-Cars, of which the following is a specification.

This invention relates to improvements in multipleunit-controlling systems for electric locomotives or motorws.

For controlling the speed of having two or more electric locomotives or motor-cars a system of control-- ling circuitsbesides the motor-circuits has been used for the operation of circuit-breakers, drum-regulators, or'the like, which accomplish the connections of the motor-circuits required for starting and regulating the speed. The said controlling-circuits may be led through several electric locomotives or motor-cars coupled to each other and may be controlled from each of the latter, so that the same connections are simultaneously accomplished in all the said locomotives or motor-cars. For each controlling-circuit one wire is protives and each supplying current to one circuit-breaker on each locomotive. For forward and backward movement wires are used arid further one or more wires are provided for each speed. A controlling-device of said kind is known as multiple-.unit-controlling-system. If

The object of the present invention is to remove the said disadvantage and it consists principally in the combination with a multiple-unit-controlling-system of means for regulating independently the voltages supplied to the motors of each unit, as will be more particularly set forth herebelow.

The invention may be carried into practice in different manners depending'on the kind of .electric current used, the connection of the motors, the manner of supplying the same with current, and so on. i

In the accompanying drawings forming a part of this specification I have shown some forms of the invention,

where the driving-motors of the electric locomotives are supplied with alternating current of high voltage through auto-transformers.

Figure 1 illustrates diagrammatically the connection of one electric locomotive to another locomotive provided with devices according to the present invention for suiting the speed of the latter to that or the former.

2 and 3 show likewise diagrammatically other forms of the invention.

.Referring to Fig. l, A is an-electric locomotive provided with a current-collector 1 which is connected to the one pole of an auto-transformer 2, the other pole of which is connected to the earth by means of a wire 3. The said transformer is provided with spaced leads connected to electro-magnetically operated circuitbreakers 4, 5, 6, 7,8 and 9, to which current is supplied by means of the controlling-wires 10, ll, l2, 13, 14 and 15 running through the train, and correspond.- ing branch-wires 16, l7, l8, 19, 20, and 21. The controlling circuit is taken out through an extra connection 22 of the transformer and is supplied to the several controlling-wires through the motor-mans switch 23, it being supposed that the train is controlled from the locomotive A. B represents the other locomotive connected to the locomotive A and controlled there'- from, the locomotive B being provided with devices embodying the present invention, whereby the control of its speed may be varied within wide limits so as to suit to the control of speed of the locomotive A or of other locomotives to which it eventually will be connected. For such purpose the auto-transformer 24 has .a greater number of spaced leads than that used for the normal'control oi speedfrom starting to full speed. The controlling wires 25, 26, 27, 28, 29, and 30 are connected to a switching device 31 by means of which they may be connected to any desired set of the electro-magnetically operated circuitbrcakcrs inserted in the said spaced leads so as to obtain the desired control of speed. In the form shown nine circuit-breakers 32, 33, 34, 35, 36, 37, 38, 39, and 40 are provided, and the switching-deviceSl has four Operation-positions a, b, c, and d, see Fig. 1, whereby four different controls of speed may be obtained. In the active position a, the motor control is attained by-means of the switches or circuit breakers 32 to 37, inclusive, while the switches 38, 39 and 40 aredisconnected, with the result that themotors are supplied with the highest voltages to assure their running at the greatest speeds. In the active position b, the motor control is obtained by means of the switches 33 to 38, inclusive; the switches 32, and 39, being disconnected. In consequence of this, the voltages supplied to the motors 44, 45 will be less than'in the position a and. accordingly the speed will be lower. In the active position 0, the motor control is obtained by means of the switches 34 to 39, in-.

which can be obtained from the transformer 24 and'accordingly the lowest speeds of the motors 44, 45. The

' locomotive B has a motor-man's switch 41 which is used only when the trainiscontrolledirom thelocomotive B.

The motors of both locomotives are shown as seriesmotors 42, 43 and 44, 45 connected in parallel.

When the' locomotives are coupled together, the switching-device'31 is placed in such a position, for instance the position a, which best affords the control of speed of the locomotive A, i. e. assures that the motors of both locomotives at approximately the same speed will be loaded with normal current and will consequently work in an economical manner. Supposing iurther that the motors, have approximately similar curves of speed, eventual overloads will distribute themselves almost proportionally to the power of the motors.

When the motor-mans switch 23 is placed its first operation-posifion, a controlling current will be supplied from the lead 22 through the controlling-wire l0 and therefrom through the branch-wires 16 and 25 to thecircuit-breakers 4 and 32 on the locomotives A- and B respectively, whereby a starting currentwill be are provided, one for each controlling-wire 53, 54, 55,

56, 57, and 58. In order to render it possible to efiect in the said device an adjustment for different controls of speed, I arrange between the said circuit-breakers -4752 and the spaced leads special switches, a contact-apparatus 59, as is shown, or the like, whereby the said circuit-breakers may be connected to that group of spaced leads that gives the desired control of speed.

In the form shown in Fig. 3 switches 60, 61, and 62 are provided between the current collector 63 and spaced leads oi the transformer 64. By closing the one or the other of said switches the voltage may be w ried, which is supplied through the circuit-breakers 65,

66, 67, 68, 69, and 76 to the motors 71 and 72. In other respects the device is chiefly the same as that 1 shown in Fig. 1. The speed of the locomotive will be greatest if 'the switch 62 be closed, and smallest if the switch 60 be closed. One may also obtain such a control of speed if the earth-wire be connected to difierent' points of the transformer.

Though I have shown the application of my invention to an alternating current system where volume and voltage of current are controlled by an auto-trans.

former, it is obvious that the invention may be applied to other electric railway-systems for continuous or alter nating current, in which the multiple-unit-controllingy system may be used. 1 I

Having now described my invention what I claim is: 1. The combination of. a multlple-unit-controliing-system for electric railway-trains, and means whereby the re .ch:mging independently the connections oi. said controlling means. substantially asand for the purpose set forth.

3. The combination with a multiple-unit-controlling system for electric railway-trains, of transformers supplying the motorunits, said transformers having a greater num=" ber'ot spaced leads than the number ot speed stages of the motors, and means for changing independently the groups of spaced leads used for supplying the motors, substantially as and for the purpose set forth.

4. The combination with a multiple unit-controlling-system for electric railway-trains, of transformers supplying the motorunits, a number 01' switches for regulating the voltages supplied to the motor-units from the' said transformers, a number of circuits controlling the said switches, and menus for changing the connections between the said switches and the said controlling circuits, substantially as and for the purposeset forth. f

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses. p RAGNAR WIKANDER. Witnesses Evans DELMAR, Jorm Dnnusn. 

